▎ 摘　　要

NOVELTY - The device has an insulating film (130) arranged over a reflection plate (110). Dielectric patterns are aligned on the insulating film in first direction (D1) and extended in parallel in second direction (D2) intersecting the first direction. First graphene patterns (GR1) and second graphene patterns (GR2) are provided between the dielectric patterns and alternately aligned in the first direction. The dielectric patterns and the first and second graphene patterns fully cover a top of the insulating film. Dielectric pattern pairs (SRP) are isolated from each other in the first direction with one of the second graphene patterns interposed between the dielectric pattern pairs, where width of each of the first graphene patterns in the first direction is different from width of each of the second graphene patterns in the first direction. USE - Optical modulation device for changing transmission/reflection, polarization, phase, intensity and path of incident light used in optical devices. ADVANTAGE - The device enables active 2π phase modulation while maintaining uniform amplitude so as to avoid crossing phenomenon despite trade-off problem, and provides improved modulation performance using liquid crystals or micro mirrors so as to reduce size of an element to size smaller than wavelength tens of times. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for realizing phase modulation using an optical modulation device. DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of an optical modulation device. 100Substrate 110Reflection plate 130Insulating film D1First direction D2Second direction GR1First graphene patterns GR2Second graphene patterns SRPDielectric pattern pairs